78f69b66d4
There are certain consumer devices which are outliers in protocol conformance. An example is Samsung bluray players, which require broadcast DHCP responses (on Ethernet only, strangely not on Wifi). By specifying: config host ... option broadcast 1 this will enable the response to be sent as an Ethernet broadcast and not as a unicast. Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com> SVN-Revision: 38365
562 lines
13 KiB
Bash
562 lines
13 KiB
Bash
#!/bin/sh /etc/rc.common
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# Copyright (C) 2007-2012 OpenWrt.org
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START=60
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USE_PROCD=1
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PROG=/usr/sbin/dnsmasq
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DNS_SERVERS=""
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DOMAIN=""
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ADD_LOCAL_DOMAIN=1
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ADD_LOCAL_HOSTNAME=1
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CONFIGFILE="/var/etc/dnsmasq.conf"
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xappend() {
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local value="$1"
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echo "${value#--}" >> $CONFIGFILE
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}
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dhcp_calc() {
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local ip="$1"
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local res=0
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while [ -n "$ip" ]; do
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part="${ip%%.*}"
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res="$(($res * 256))"
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res="$(($res + $part))"
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[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
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done
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echo "$res"
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}
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append_bool() {
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local section="$1"
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local option="$2"
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local value="$3"
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local _loctmp
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config_get_bool _loctmp "$section" "$option" 0
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[ $_loctmp -gt 0 ] && xappend "$value"
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}
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append_parm() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local _loctmp
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config_get _loctmp "$section" "$option"
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[ -z "$_loctmp" ] && return 0
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xappend "$switch=$_loctmp"
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}
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append_server() {
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xappend "--server=$1"
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}
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append_address() {
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xappend "--address=$1"
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}
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append_interface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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xappend "--interface=$ifname"
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}
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append_notinterface() {
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local ifname=$(uci_get_state network "$1" ifname "$1")
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xappend "--except-interface=$ifname"
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}
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append_addnhosts() {
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xappend "--addn-hosts=$1"
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}
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append_bogusnxdomain() {
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xappend "--bogus-nxdomain=$1"
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}
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dnsmasq() {
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local cfg="$1"
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append_bool "$cfg" authoritative "--dhcp-authoritative"
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append_bool "$cfg" nodaemon "--no-daemon"
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append_bool "$cfg" domainneeded "--domain-needed"
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append_bool "$cfg" filterwin2k "--filterwin2k"
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append_bool "$cfg" nohosts "--no-hosts"
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append_bool "$cfg" nonegcache "--no-negcache"
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append_bool "$cfg" strictorder "--strict-order"
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append_bool "$cfg" logqueries "--log-queries"
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append_bool "$cfg" noresolv "--no-resolv"
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append_bool "$cfg" localise_queries "--localise-queries"
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append_bool "$cfg" readethers "--read-ethers"
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append_bool "$cfg" dbus "--enable-dbus"
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append_bool "$cfg" boguspriv "--bogus-priv"
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append_bool "$cfg" expandhosts "--expand-hosts"
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append_bool "$cfg" enable_tftp "--enable-tftp"
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append_bool "$cfg" nonwildcard "--bind-interfaces"
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append_bool "$cfg" fqdn "--dhcp-fqdn"
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append_bool "$cfg" proxydnssec "--proxy-dnssec"
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append_parm "$cfg" dhcpscript "--dhcp-script"
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append_parm "$cfg" cachesize "--cache-size"
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append_parm "$cfg" dnsforwardmax "--dns-forward-max"
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append_parm "$cfg" port "--port"
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append_parm "$cfg" ednspacket_max "--edns-packet-max"
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append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
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append_parm "$cfg" "queryport" "--query-port"
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append_parm "$cfg" "domain" "--domain"
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append_parm "$cfg" "local" "--server"
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config_list_foreach "$cfg" "server" append_server
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config_list_foreach "$cfg" "address" append_address
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config_list_foreach "$cfg" "interface" append_interface
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config_list_foreach "$cfg" "notinterface" append_notinterface
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config_list_foreach "$cfg" "addnhosts" append_addnhosts
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config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
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append_parm "$cfg" "leasefile" "--dhcp-leasefile"
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append_parm "$cfg" "resolvfile" "--resolv-file"
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append_parm "$cfg" "tftp_root" "--tftp-root"
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append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
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append_parm "$cfg" "local_ttl" "--local-ttl"
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config_get DOMAIN "$cfg" domain
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config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
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config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
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config_get_bool readethers "$cfg" readethers
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[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
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config_get leasefile $cfg leasefile
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[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
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config_get_bool cachelocal "$cfg" cachelocal 1
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config_get hostsfile "$cfg" dhcphostsfile
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[ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
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mkdir -p /tmp/hosts
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xappend "--addn-hosts=/tmp/hosts"
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local rebind
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config_get_bool rebind "$cfg" rebind_protection 1
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[ $rebind -gt 0 ] && {
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logger -t dnsmasq \
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"DNS rebinding protection is active," \
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"will discard upstream RFC1918 responses!"
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xappend "--stop-dns-rebind"
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local rebind_localhost
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config_get_bool rebind_localhost "$cfg" rebind_localhost 0
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[ $rebind_localhost -gt 0 ] && {
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logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
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xappend "--rebind-localhost-ok"
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}
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append_rebind_domain() {
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logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
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xappend "--rebind-domain-ok=$1"
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}
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config_list_foreach "$cfg" rebind_domain append_rebind_domain
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}
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dhcp_option_add "$cfg" "" 0
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xappend "--dhcp-broadcast=tag:needs-broadcast"
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echo >> $CONFIGFILE
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}
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dhcp_subscrid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get subscriberid "$cfg" subscriberid
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[ -n "$subscriberid" ] || return 0
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xappend "--dhcp-subscrid=$networkid,$subscriberid"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_remoteid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get remoteid "$cfg" remoteid
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[ -n "$remoteid" ] || return 0
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xappend "--dhcp-remoteid=$networkid,$remoteid"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_circuitid_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get circuitid "$cfg" circuitid
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[ -n "$circuitid" ] || return 0
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xappend "--dhcp-circuitid=$networkid,$circuitid"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_userclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get userclass "$cfg" userclass
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[ -n "$userclass" ] || return 0
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xappend "--dhcp-userclass=$networkid,$userclass"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_vendorclass_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get vendorclass "$cfg" vendorclass
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[ -n "$vendorclass" ] || return 0
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xappend "--dhcp-vendorclass=$networkid,$vendorclass"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_host_add() {
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local cfg="$1"
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config_get_bool force "$cfg" force 0
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
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config_get name "$cfg" name
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config_get ip "$cfg" ip
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[ -n "$ip" -o -n "$name" ] || return 0
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config_get mac "$cfg" mac
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[ -z "$mac" ] && {
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[ -n "$name" ] || return 0
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mac="$name"
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name=""
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}
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macs=""
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for m in $mac; do append macs "$m" ","; done
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config_get tag "$cfg" tag
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config_get_bool broadcast "$cfg" broadcast 0
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[ "$broadcast" = "0" ] && broadcast=
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xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
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}
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dhcp_tag_add() {
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local cfg="$1"
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tag="$cfg"
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[ -n "$tag" ] || return 0
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config_get_bool force "$cfg" force 0
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[ "$force" = "0" ] && force=
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config_get option "$cfg" dhcp_option
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for o in $option; do
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xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
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done
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}
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dhcp_mac_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || return 0
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config_get mac "$cfg" mac
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[ -n "$mac" ] || return 0
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xappend "--dhcp-mac=$networkid,$mac"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_boot_add() {
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local cfg="$1"
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config_get networkid "$cfg" networkid
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config_get filename "$cfg" filename
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[ -n "$filename" ] || return 0
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config_get servername "$cfg" servername
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[ -n "$servername" ] || return 0
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config_get serveraddress "$cfg" serveraddress
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[ -n "$serveraddress" ] || return 0
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xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
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config_get_bool force "$cfg" force 0
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dhcp_option_add "$cfg" "$networkid" "$force"
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}
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dhcp_add() {
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local cfg="$1"
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config_get net "$cfg" interface
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[ -n "$net" ] || return 0
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config_get networkid "$cfg" networkid
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[ -n "$networkid" ] || networkid="$net"
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config_get ifname "$net" ifname
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[ -n "$ifname" ] || return 0
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config_get dnsserver "$net" dns
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[ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
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DNS_SERVERS="$DNS_SERVERS $dnsserver"
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}
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append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
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config_get proto "$net" proto
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[ static = "$proto" ] || return 0
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config_get ipaddr "$net" ipaddr
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config_get netmask "$cfg" netmask
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[ -n "$netmask" ] || config_get netmask "$net" netmask
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#check for an already active dhcp server on the interface, unless 'force' is set
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config_get_bool force "$cfg" force 0
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[ $force -gt 0 ] || {
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udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
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logger -t dnsmasq \
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"found already running DHCP-server on interface '$ifname'" \
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"refusing to start, use 'option force 1' to override"
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return 0
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}
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}
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config_get start "$cfg" start
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config_get limit "$cfg" limit
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config_get leasetime "$cfg" leasetime
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config_get options "$cfg" options
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config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
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leasetime="${leasetime:-12h}"
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start="$(dhcp_calc "${start:-100}")"
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limit="${limit:-150}"
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[ "$limit" -gt 0 ] && limit=$((limit-1))
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eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
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if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
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xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
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dhcp_option_add "$cfg" "$networkid"
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}
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dhcp_option_add() {
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local cfg="$1"
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local networkid="$2"
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local force="$3"
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[ "$force" = "0" ] && force=
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config_get dhcp_option "$cfg" dhcp_option
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for o in $dhcp_option; do
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xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
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done
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}
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dhcp_domain_add() {
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local cfg="$1"
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local ip name names record
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config_get names "$cfg" name "$2"
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[ -n "$names" ] || return 0
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config_get ip "$cfg" ip "$3"
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[ -n "$ip" ] || return 0
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for name in $names; do
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record="${record:+$record/}$name"
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done
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xappend "--address=/$record/$ip"
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}
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dhcp_srv_add() {
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local cfg="$1"
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config_get srv "$cfg" srv
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[ -n "$srv" ] || return 0
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config_get target "$cfg" target
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[ -n "$target" ] || return 0
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config_get port "$cfg" port
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[ -n "$port" ] || return 0
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config_get class "$cfg" class
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config_get weight "$cfg" weight
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local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
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xappend "--srv-host=$service"
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}
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dhcp_mx_add() {
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local cfg="$1"
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local domain relay pref
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config_get domain "$cfg" domain
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[ -n "$domain" ] || return 0
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config_get relay "$cfg" relay
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[ -n "$relay" ] || return 0
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config_get pref "$cfg" pref 0
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local service="$domain,$relay,$pref"
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xappend "--mx-host=$service"
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}
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dhcp_cname_add() {
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local cfg="$1"
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local cname target
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config_get cname "$cfg" cname
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[ -n "$cname" ] || return 0
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config_get target "$cfg" target
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[ -n "$target" ] || return 0
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xappend "--cname=${cname},${target}"
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}
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dhcp_hostrecord_add() {
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local cfg="$1"
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local names addresses record val
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config_get names "$cfg" name "$2"
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if [ -z "$names" ]; then
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return 0
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fi
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config_get addresses "$cfg" ip "$3"
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if [ -z "$addresses" ]; then
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return 0
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fi
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for val in $names $addresses; do
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record="${record:+$record,}$val"
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done
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xappend "--host-record=$record"
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}
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service_triggers()
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{
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procd_add_reload_trigger "dhcp"
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}
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start_service() {
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include /lib/network
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scan_interfaces
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local lanaddr
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config_get lanaddr "lan" ipaddr
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config_load dhcp
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procd_open_instance
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procd_set_param command $PROG -C $CONFIGFILE -k
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procd_close_instance
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# before we can call xappend
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mkdir -p $(dirname $CONFIGFILE)
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echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
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# if we did this last, we could override auto-generated config
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[ -f /etc/dnsmasq.conf ] && {
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xappend "--conf-file=/etc/dnsmasq.conf"
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}
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args=""
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config_foreach dnsmasq dnsmasq
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config_foreach dhcp_host_add host
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echo >> $CONFIGFILE
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config_foreach dhcp_boot_add boot
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config_foreach dhcp_mac_add mac
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config_foreach dhcp_tag_add tag
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config_foreach dhcp_vendorclass_add vendorclass
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config_foreach dhcp_userclass_add userclass
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config_foreach dhcp_circuitid_add circuitid
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config_foreach dhcp_remoteid_add remoteid
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config_foreach dhcp_subscrid_add subscrid
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config_foreach dhcp_domain_add domain
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config_foreach dhcp_hostrecord_add hostrecord
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# add own hostname
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[ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
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local hostname="$(uci_get system @system[0] hostname OpenWrt)"
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dhcp_hostrecord_add "" "$hostname${DOMAIN:+.$DOMAIN $hostname}" "$lanaddr"
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}
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echo >> $CONFIGFILE
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config_foreach dhcp_srv_add srvhost
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config_foreach dhcp_mx_add mxhost
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echo >> $CONFIGFILE
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config_foreach dhcp_add dhcp
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echo >> $CONFIGFILE
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config_foreach dhcp_cname_add cname
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echo >> $CONFIGFILE
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rm -f /tmp/resolv.conf
|
|
[ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
|
|
echo "search $DOMAIN" >> /tmp/resolv.conf
|
|
}
|
|
DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
|
|
for DNS_SERVER in $DNS_SERVERS ; do
|
|
echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
|
|
done
|
|
}
|
|
|
|
stop_service() {
|
|
[ -f /tmp/resolv.conf ] && {
|
|
rm -f /tmp/resolv.conf
|
|
ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
|
|
}
|
|
}
|